However, according to technical director, Rene Sugo, the uptake of VoIP, especially in the business market, is being held back significantly by the difficulty VoIP providers have in porting customers' telephone numbers - enabling them to use their existing numbers with their new VoIP service.
For 'category C' customers - business with large blocks of numbers and complex arrangements the process can take up to eight weeks at present, according to Sugo, and lacks predictability.
"This means the VoIP provider has to install the VoIP service first and then arrange the port. Customers have to use, and pay, for both systems during the cutover period," he said.
Rather than go through the pain of this process, many small business retain their old telephone lines for incoming calls and use their new VoIP service for outgoing calls only.
But according to Sugo, "More and more people are wanting to reduce the double cost, even big customer with 30 or 60 channel ISDN trunks want to port their service and get rid of the [ISDN] because that is when they really start to make savings."
However equally important will be the predictability Symbio hopes to bring to porting. "We will be in control of the process so we will be able to plan the installation of the VoIP service in sync with the porting," Sugo said.
Symbio, he said aims to make the process of switching from PSTN services to VoIP as painless for customers and changing between PSTN service providers.
"We have to me more professional, it has to be like dealing with a tier one telco: a defined process, a predictable timeframe and a grade of service that business customers can feel comfortable with."
To achieve this Symbio has acquired a carrier access code that will enable it to interconnect its VoIP infrastructure with Tier 1 and Tier 2 telcos in a way that is on par with how they interconnect with each other.
It then intends to put in place porting agreements with some of the largest telcos (Sugo won't say which at present) and to make use of their business-to-business systems to automate the porting process as much as possible.
In anticipation of the increased customers and traffic that this will bring, Symbio says it is "expanding active network capacity to triple current infrastructure volumes."
Symbio claims as one of its key differentiators its in-house R&D capability. "This has allowed Symbio to develop all of the software needed for integration into to the Australian PSTN. Important B2B applications such as local number portability, carrier route selection, billing mediation and others have all been developed in-house; which means these capabilities are tightly integrated into Symbio's fully VoIP core network, highly automated and all Web -enabled."